OK try this...Kill one of the Vmclients and see if your GPU PPD goes back up to normal. I have a feeling it might be that you're on XP now and it uses more CPU. I would kill all the folding first, reboot, then start up the 4 GPU clients and only 1 Vmclient. you should know within about 15-20 mins what kind of PPD your GPU's are putting up.